A double-layered liquid hydrogen storage tank

Abstract

The application belongs to the technical field of liquid hydrogen storage tanks, and discloses a double-layer liquid hydrogen storage tank, which comprises an outer layer, a feed inlet is fixedly installed at the top end of the outer layer, an inner layer is installed inside the outer layer, a supporting assembly is installed at the position between the outer side of the inner layer and the outer layer, a plurality of annular rings are installed at the position between the outer side of the inner layer and the outer layer, a plurality of reinforcing members are connected through the inner part of the annular rings, an outer heat insulation layer is installed at the position between the inner wall of the outer layer and the adjacent two annular rings, and an outer arc-shaped plate is connected to the back of the outer heat insulation layer. The application can significantly improve the overall structural stability of the liquid hydrogen storage tank, prevent the deformation or damage of the storage tank when the storage tank is subjected to external force impact or environmental change, improve the bottom support force of the inner layer, effectively prevent the strength reduction problem of the inner layer due to the fact that most of the inner layer is located in the gap, thereby enhancing the durability and safety of the inner layer, and ensuring that the liquid hydrogen storage tank can be used for a long time, stably and safely.

Description

Technical Field

[0001] This invention belongs to the field of liquid hydrogen storage tank technology, and particularly relates to a double-layered liquid hydrogen storage tank. Background Technology

[0002] In the field of liquid hydrogen storage tanks, liquid hydrogen is widely used in aerospace and cryogenic technology due to its extremely low boiling point and high energy density. However, the design of the storage tank is crucial for the safe and efficient storage and transportation of liquid hydrogen. A key technical challenge is how to effectively reduce the evaporation loss of liquid hydrogen in cryogenic environments while ensuring the structural integrity of the storage tank under high pressure and low temperature conditions.

[0003] In existing technologies, although single-layer liquid hydrogen storage tanks have a simple structure, their evaporation rate is high and cannot meet the high-efficiency requirements for long-term storage and transportation. In contrast, double-layer liquid hydrogen storage tanks significantly reduce evaporation loss and improve energy efficiency by forming a vacuum insulation layer between the inner and outer layers of the tank.

[0004] Because a vacuum insulation layer is used for insulation, it is not easy to support the inner and outer layers, which causes the inner layer to shake, thus affecting the spacing between the inner and outer layers. Summary of the Invention

[0005] This invention addresses the problem in existing technologies that utilize vacuum insulation layers for heat insulation, where the inner and outer layers are difficult to support, leading to inner layer swaying and affecting the spacing between the inner and outer layers. The invention proposes the following technical solution:

[0006] A double-layered liquid hydrogen storage tank includes: an outer layer, an inlet fixedly installed at the top of the outer layer, an inner layer installed inside the outer layer, and a support assembly installed between the outer side of the inner layer and the outer layer;

[0007] Several rings are installed between the outer side of the inner layer and the outer layer. Several reinforcing members are connected through the rings. An outer heat insulation layer is installed between two adjacent rings at the inner wall of the outer layer. An outer arc-shaped plate is attached to the back of the outer heat insulation layer. A herringbone support plate is symmetrically fixed on both sides of the bottom end of the outer arc-shaped plate. An inner arc-shaped plate is fixedly installed at one end of the herringbone support plate. An inner heat insulation layer that is attached to the outer side of the inner layer is fixedly installed on the inner side of the inner arc-shaped plate.

[0008] As a preferred embodiment of the above technical solution, the ring has equidistant mounting holes inside, the reinforcing member is installed inside the mounting holes, and the reinforcing member is in the shape of a hollow cylinder.

[0009] As a preferred embodiment of the above technical solution, a heat dissipation chamber is provided between the outer side of the inner layer and the inner side of the outer layer, located between the two rings, and the reinforcing member has a flow guide hole inside the heat dissipation chamber.

[0010] As a preferred embodiment of the above technical solution, both the inner and outer arc-shaped plates have arc-shaped corners on their outer sides, and the reinforcing member is located inside the arc-shaped corners of the inner and outer arc-shaped plates.

[0011] As a preferred embodiment of the above technical solution, a snap-fit ​​plate is installed between the inner arc plate and the outer arc plate. Snap-fit ​​holes are respectively opened inside the inner arc plate and the outer arc plate at one end of the snap-fit ​​plate. The two ends of the snap-fit ​​plate are snapped and connected to the inner arc plate and the outer arc plate respectively through the snap-fit ​​holes.

[0012] As a preferred embodiment of the above technical solution, a partition plate is fixedly installed in the middle of the inner wall of the inner layer, and a connecting pipe is embedded in the bottom end of the partition plate. A piston column is slidably connected to the inside of the connecting pipe.

[0013] As a preferred embodiment of the above technical solution, inclined grooves are symmetrically opened on both sides of the inner wall of the connecting pipe, support rods are symmetrically fixedly installed at both ends of the connecting pipe, and a cylinder is fixedly installed between the two support rods.

[0014] As a preferred embodiment of the above technical solution, the piston rod is sleeved on the outside of the cylinder, and the outside of the piston rod and the inner wall of the connecting pipe are in close contact with each other.

[0015] As a preferred embodiment of the above technical solution, a positioning groove is provided in the middle of the outer surface of the piston rod, and a sealing gasket is snapped into place on the outer side of the piston rod inside the positioning groove.

[0016] The beneficial effects of this invention are as follows:

[0017] (1) It can significantly improve the overall structural stability of liquid hydrogen storage tanks, prevent the tanks from deforming or breaking when subjected to external impact or environmental changes, and enhance the bottom support of the inner layer, effectively preventing the strength reduction problem that may occur due to the inner layer being mostly located in the void, thereby enhancing the durability and safety of the inner layer and ensuring that the liquid hydrogen storage tank can be used for a long time, stably and safely.

[0018] (2) It can effectively disperse external forces and avoid stress concentration in specific areas, which helps to extend the service life of liquid hydrogen storage tanks;

[0019] (3) It can significantly improve the thermal insulation performance of the double-layer liquid hydrogen storage tank, reduce the loss of cold energy, ensure the constant temperature of liquid hydrogen during storage, extend the effective service life of the storage tank, and effectively manage the thermal stress caused by temperature changes in the inner and outer layer materials through the design of different insulation layers and the arrangement of support structures, thus extending the service life of the storage tank.

[0020] (4) By the flow and exchange of gas between multiple chambers, the occurrence of local hot spots can be reduced, and heat can be more evenly distributed in all parts of the heat dissipation system.

[0021] (5) By dividing liquid hydrogen into multiple parts, the rate of uniform evaporation of liquid hydrogen throughout the tank can be slowed down, thereby reducing low-temperature evaporation loss and improving the storage efficiency of liquid hydrogen. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of a double-layered liquid hydrogen storage tank in Example 1;

[0023] Figure 2 The diagram shown is a cross-sectional view of a double-layered liquid hydrogen storage tank according to Example 1;

[0024] Figure 3 The diagram shown is a structural schematic of the support component in Embodiment 1;

[0025] Figure 4 The image shown is a front view of the support component in Embodiment 1;

[0026] Figure 5 The diagram shown is a structural schematic of the reinforcing member in Embodiment 1;

[0027] Figure 6 The diagram shown is a structural schematic of the sealing gasket in Example 1.

[0028] In the diagram: 1. Outer layer; 2. Feed inlet; 3. Inner layer; 4. Support assembly; 41. Ring; 42. Mounting hole; 43. Reinforcing member; 44. Positioning hole; 45. Outer insulation layer; 46. Inner insulation layer; 47. Inner arc plate; 48. Herringbone support plate; 49. Outer arc plate; 410. Snap-fit ​​plate; 5. Partition plate; 6. Connecting pipe; 7. Inclined groove; 8. Support rod; 9. Cylinder; 10. Piston column; 11. Sealing gasket. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0030] Example 1

[0031] This invention provides a double-layered liquid hydrogen storage tank, such as... Figures 1 to 6 As shown, it includes an outer layer 1, an inlet 2 fixedly installed at the top of the outer layer 1, an inner layer 3 installed inside the outer layer 1, and a support assembly 4 installed between the outer side of the inner layer 3 and the outer layer 1. The outer layer 1, the inner layer 3 and the inlet 2 are combined to form a double-layer liquid hydrogen storage tank.

[0032] Several rings 41 are installed between the outer side of the inner layer 3 and the outer layer 1. Several reinforcing members 43 are connected through the rings 41. An outer heat insulation layer 45 is installed between two adjacent rings 41 at the inner wall of the outer layer 1. An outer arc plate 49 is attached to the back of the outer heat insulation layer 45. A herringbone support plate 48 is symmetrically fixed on both sides of the bottom end of the outer arc plate 49. An inner arc plate 47 is fixedly installed at one end of the herringbone support plate 48. An inner heat insulation layer 46 is fixedly installed on the inner side of the inner arc plate 47 and is attached to the outer side of the inner layer 3.

[0033] like Figure 3 and Figure 4 As shown, mounting holes 42 are equidistantly provided inside the ring 41, and the reinforcing member 43 is installed inside the mounting holes 42. The reinforcing member 43 is in the shape of a hollow cylinder.

[0034] Personnel install the reinforcing member 43 along the mounting hole 42 and the ring 41, thereby fixing the multiple rings 41. Through the hollow cylindrical reinforcing member 43, gas can flow along the inside of the reinforcing member 43, thereby enabling gas exchange.

[0035] like Figure 3 and Figure 5 As shown, a heat dissipation chamber is set between the outer side of the inner layer 3 and the inner side of the outer layer 1, located between the two rings 41. The reinforcing member 43 is located inside the heat dissipation chamber and has a flow guide hole.

[0036] The gas flowing inside the reinforcing member 43 enters the heat dissipation chamber through the guide hole, which causes the gas inside the multiple heat dissipation chambers to exchange, thereby keeping the temperature inside the multiple heat dissipation chambers consistent and preventing the problem of temperature deviation on the outside of the liquid hydrogen storage tank.

[0037] like Figure 3 and Figure 4 As shown, both the inner arc plate 47 and the outer arc plate 49 have arc-shaped corners on their outer sides. The reinforcing member 43 is located inside the arc-shaped corners of the inner arc plate 47 and the outer arc plate 49. A snap-fit ​​plate 410 is installed between the inner arc plate 47 and the outer arc plate 49. Snap-fit ​​holes are opened inside the inner arc plate 47 and the outer arc plate 49 at one end of the snap-fit ​​plate 410, respectively. The two ends of the snap-fit ​​plate 410 are snapped and connected to the inner arc plate 47 and the outer arc plate 49 through the snap-fit ​​holes.

[0038] The snap-fit ​​plate 410 supports the middle of the inner arc plate 47 and the outer arc plate 49, preventing deformation of the middle of the inner arc plate 47 and the outer arc plate 49. At the same time, under the action of the arc angle, the inner arc plate 47 and the inner side of the outer arc plate 49 on the outside of the reinforcing member 43 are fitted together, thereby achieving the purpose of positioning the inner arc plate 47 and the outer arc plate 49 and preventing displacement of the inner arc plate 47 and the outer arc plate 49.

[0039] like Figure 2 and Figure 6 As shown, a partition plate 5 is fixedly installed in the middle of the inner wall of the inner layer 3, and a connecting pipe 6 is embedded in the bottom end of the partition plate 5. A piston column 10 is slidably connected to the inside of the connecting pipe 6.

[0040] The partition plate 5 divides the interior of the inner layer 3 into two spaces. The connecting pipe 6 allows the liquid hydrogen in the two spaces of the inner layer 3 to flow, changing the flow difficulty. The piston column 10 blocks the two sides, thus isolating them and preventing the liquid hydrogen in the two spaces from mixing.

[0041] like Figure 2 and Figure 6 As shown, inclined grooves 7 are symmetrically opened on both sides of the inner wall of the connecting pipe 6, and support rods 8 are symmetrically fixedly installed at both ends of the connecting pipe 6. A cylinder 9 is fixedly installed between the two support rods 8. The piston column 10 is sleeved on the outside of the cylinder 9. The outside of the piston column 10 and the inner wall of the connecting pipe 6 are in close contact with each other. A positioning groove is opened in the middle of the outer surface of the piston column 10. A sealing gasket 11 is snapped and installed inside the positioning groove on the outside of the piston column 10.

[0042] The cylinder 9 is fixed by the two support rods 8, and the piston rod 10 is limited by the cylinder 9, so that the piston rod 10 can only move left and right and cannot swing. The sealing gasket 11 increases the sealing between the piston rod 10 and the connecting pipe 6, and the positioning groove facilitates the installation of the sealing gasket 11, which changes the installation difficulty of the sealing gasket 11.

[0043] Working principle: In actual use, the device supports the outer layer 1 and the inner layer 3 through the ring 41, thus supporting the gap between the outer layer 1 and the inner layer 3. This increases the bottom support force of the inner layer 3 and prevents the overall strength of the inner layer 3 from being low due to most of the outer side being inside the gap. At this time, under the action of the reinforcing member 43, the multiple rings 41 form a whole. The combined action of the ring 41 and the reinforcing member 43 can significantly improve the overall structural stability of the liquid hydrogen storage tank, preventing the tank from deforming or breaking when subjected to external impact or environmental changes. Furthermore, it enhances the bottom support force of the inner layer 3, effectively preventing the strength reduction problem that may occur when most of the inner layer 3 is located in the gap, thereby enhancing the durability and safety of the inner layer 3. This ensures that the liquid hydrogen storage tank can be used for a long time, stably and safely. It can also effectively disperse external forces and avoid stress concentration in specific areas, which helps to extend the service life of the liquid hydrogen storage tank.

[0044] In this process, the inner arc plate 47, the herringbone support plate 48, and the outer arc plate 49 are used to create a barrier, and then the snap-fit ​​plate 410 is installed to fix the outer arc plate 49 and the inner arc plate 47. The outer arc plate 49 and the inner arc plate 47 are used to support the outer insulation layer 45 and the inner insulation layer 46. By adding the outer insulation layer 45 and the inner insulation layer 46 between the outer layer 1 and the inner layer 3, the thermal insulation performance of the double-layer liquid hydrogen storage tank can be significantly improved, the loss of cold energy can be reduced, the temperature of liquid hydrogen can be kept constant during storage, and the effective service life of the storage tank can be extended. Furthermore, through the design of different insulation layers and the arrangement of the support structure, the thermal stress caused by temperature changes in the inner and outer layer materials can be effectively managed, thus extending the service life of the storage tank.

[0045] Finally, as the two rings 41 combine to form a heat dissipation chamber, the gas inside the heat dissipation chamber changes. As the gas expands, it flows. At this time, the gas enters another heat dissipation chamber through the positioning hole 44 of the reinforcing member 43, thereby allowing the gas inside multiple heat dissipation chambers to exchange. Through the flow and exchange of gas between multiple chambers, the occurrence of local hot spots can be reduced, and the heat can be more evenly distributed in all parts of the heat dissipation system.

[0046] Finally, liquid hydrogen is added into the liquid hydrogen storage tank consisting of outer layer 1 and inner layer 3 through inlet 2. As liquid hydrogen is added into inner layer 3, its height increases. This increases the height of the liquid hydrogen, driving piston column 10 to move along the outside of cylinder 9 and into the other end of partition plate 5. At this time, the liquid inside the two partition plates 5 in inner layer 3 rises synchronously, keeping the liquid height consistent. Then, the system is allowed to settle. During this settling process, the initial liquid height in inner layer 2 is the same. When the system reaches equilibrium, piston column 10 will stop at a position where the total weight of the liquid columns on both sides is equal. Since the liquid density is the same, the total weight of the liquid will also be the same. At this point, piston column 10 is placed inside connecting pipe 6, which separates the liquid hydrogen inside inner layer 3. By dividing the liquid hydrogen into multiple parts, the rate of uniform evaporation of liquid hydrogen in the entire storage tank can be slowed down, thereby reducing low-temperature evaporation loss and improving the storage efficiency of liquid hydrogen.

[0047] Next, after the liquid hydrogen on one side of the partition plate 5 is extracted, the liquid height on both sides of the partition plate 5 is inconsistent. Since the higher the liquid height, the greater the pressure, the piston column 10 is pushed to move. When the piston column 10 moves, it drives the sealing gasket 11 to move. When the piston column 10 moves to the position inside the inclined groove 7 of the connecting pipe 6, the liquid hydrogen with the higher liquid height enters the lower end along the connecting pipe 6. After placement, the liquid hydrogen height on both sides of the two partition plates 5 is made consistent. At this time, the piston column 10 is located in the middle area of ​​the connecting pipe 6.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A double-walled liquid hydrogen storage tank, characterized in that, include: The outer layer (1) has a feed inlet (2) fixedly installed at its top. The inner layer (3) is installed inside the outer layer (1). A support component (4) is installed between the outer side of the inner layer (3) and the outer layer (1). Several rings (41) are installed between the outer side of the inner layer (3) and the outer layer (1). Several reinforcing members (43) are connected through the inside of the rings (41). An outer heat insulation layer (45) is installed between two adjacent rings (41) at the position of the inner wall of the outer layer (1). An outer arc plate (49) is attached to the back of the outer heat insulation layer (45). A herringbone support plate (48) is symmetrically fixed on both sides of the bottom end of the outer arc plate (49). An inner arc plate (47) is fixedly installed at one end of the herringbone support plate (48). An inner heat insulation layer (46) that is attached to the outer side of the inner layer (3) is fixedly installed on the inner side of the inner arc plate (47). The outer side of the inner layer (3) and the inner side of the outer layer (1) are located between the two rings (41) to form a heat dissipation chamber, and the reinforcing member (43) is provided with a flow guide hole inside the heat dissipation chamber; A partition plate (5) is fixedly installed in the middle of the inner wall of the inner layer (3). A connecting pipe (6) is embedded in the bottom end of the partition plate (5). A piston column (10) is slidably connected to the inside of the connecting pipe (6). The inner wall of the connecting pipe (6) is symmetrically provided with inclined grooves (7), and support rods (8) are symmetrically fixed at both ends of the connecting pipe (6). A cylinder (9) is fixedly installed between the two support rods (8). The piston rod (10) is sleeved on the outside of the cylinder (9), and the outside of the piston rod (10) and the inner wall of the connecting pipe (6) are in contact with each other.

2. The double-layered liquid hydrogen storage tank according to claim 1, characterized in that, The ring (41) has mounting holes (42) equidistantly spaced inside, and the reinforcing member (43) is installed inside the mounting holes (42). The reinforcing member (43) is in the shape of a hollow cylinder.

3. A double-walled liquid hydrogen storage tank according to claim 1, characterized in that, Both the inner arc plate (47) and the outer arc plate (49) have arc-shaped corners on their outer sides, and the reinforcing member (43) is located inside the arc-shaped corners of the inner arc plate (47) and the outer arc plate (49).

4. A double-walled liquid hydrogen storage tank according to claim 3, characterized in that, A snap-fit ​​plate (410) is installed between the inner arc plate (47) and the outer arc plate (49). The inner arc plate (47) and the outer arc plate (49) are respectively provided with snap-fit ​​holes at one end of the snap-fit ​​plate (410). The two ends of the snap-fit ​​plate (410) are snap-fitted to the inner arc plate (47) and the outer arc plate (49) through the snap-fit ​​holes.

5. A double-walled liquid hydrogen storage tank according to claim 1, characterized in that, A positioning groove is provided in the middle of the outer surface of the piston rod (10), and a sealing gasket (11) is snapped into the outside of the piston rod (10) inside the positioning groove.

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